实施 GoogleApiClient 时遇到问题

Posted 2023-02-23

【中文标题】实施 GoogleApiClient 时遇到问题

【英文标题】：Trouble Implementing GoogleApiClient

【发布时间】：2015-12-11 03:08:18

【问题描述】：

我正在尝试在我正在创建的应用上使用 Google 登录。我一直在使用 Google 的开发人员教程，但我收到错误“必须将类 'HomeActivity' 声明为抽象或在 'ConnectionCallbacks' 中实现抽象方法 'onConnected(Bundle)'，如下所示：

public class HomeActivity extends Activity implements
        ConnectionCallbacks,
        OnConnectionFailedListener,
        OnClickListener

这是我的 HomeActivity 代码，其中大部分来自 Google：

import android.app.Activity;
import android.content.IntentSender;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;


import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.Scopes;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.GoogleApiClient.ConnectionCallbacks;
import com.google.android.gms.common.api.GoogleApiClient.OnConnectionFailedListener;
import com.google.android.gms.common.api.Scope;
import com.google.android.gms.plus.Plus;
import static android.view.View.*;


public class HomeActivity extends Activity implements
        ConnectionCallbacks,
        OnConnectionFailedListener,
        OnClickListener 

    private static final int RC_SIGN_IN = 0;
    private GoogleApiClient mGoogleApiClient;
    private Button mLoginButton;
    private TextView mSignUpLabel;

    /* Is there a ConnectionResult resolution in progress? */
    private boolean mIsResolving = false;

    /* Should we automatically resolve ConnectionResults when possible? */
    private boolean mShouldResolve = false;


    @Override
    protected void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home);

        mLoginButton = (Button) findViewById(R.id.btnLogin);
        mLoginButton.setOnClickListener(new OnClickListener() 
            @Override
            public void onClick(View v) 
                Toast.makeText(HomeActivity.this, "Button Pressed", Toast.LENGTH_SHORT).show();
            
        );

        mSignUpLabel = (TextView) findViewById(R.id.lblAboutUs);
        mSignUpLabel.setOnClickListener(new OnClickListener() 
            @Override
            public void onClick(View v) 
                Toast.makeText(HomeActivity.this, "WAY TO SIGN UP MAN", Toast.LENGTH_SHORT).show();
            
        );

        findViewById(R.id.sign_in_button).setOnClickListener(this);

        // Build GoogleApiClient with access to basic profile
        mGoogleApiClient = new GoogleApiClient.Builder(this)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(Plus.API)
                .addScope(new Scope(Scopes.PROFILE))
                .build();
    

    @Override
    public void onConnectionSuspended(int arg0) 

        // what should i do here ? should i call mGoogleApiClient.connect() again ? ?

    

    @Override
    public boolean onCreateOptionsMenu(Menu menu) 
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_home, menu);
        return true;
    

    @Override
    public boolean onOptionsItemSelected(MenuItem item) 
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) 
            return true;
        

        return super.onOptionsItemSelected(item);
    


    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) 
        // Could not connect to Google Play Services.  The user needs to select an account,
        // grant permissions or resolve an error in order to sign in. Refer to the javadoc for
        // ConnectionResult to see possible error codes.
        Log.d(TAG, "onConnectionFailed:" + connectionResult);

        if (!mIsResolving && mShouldResolve) 
            if (connectionResult.hasResolution()) 
                try 
                    connectionResult.startResolutionForResult(this, RC_SIGN_IN);
                    mIsResolving = true;
                 catch (IntentSender.SendIntentException e) 
                    Log.e(TAG, "Could not resolve ConnectionResult.", e);
                    mIsResolving = false;
                    mGoogleApiClient.connect();
                
             else 
                // Could not resolve the connection result, show the user an
                // error dialog.
                showErrorDialog(connectionResult);
            
         else 
            // Show the signed-out UI
            showSignedOutUI();
        
    

    @Override
    protected void onStart() 
        super.onStart();
        mGoogleApiClient.connect();
    

    @Override
    protected void onStop() 
        super.onStop();
        mGoogleApiClient.disconnect();
    

任何帮助将不胜感激！！！

【参考方案1】：

您的类声明它将实现ConnectionCallbacks，这意味着您必须定义该接口中包含的所有方法（以及您希望实现的所有其他接口）。两者都有

Android Studio（点击左端的灯泡）和 Eclipse 必须能够自动实现未实现的方法（您当然必须用任何自定义代码填充它们）

【讨论】：

哇，我也完全知道。太感谢了！这是一个很大的帮助！